Hi Ben,
On Wed, 2023-10-25 at 09:05 -0700, Ben Greear wrote:
> I noticed mt7922 radios would no longer enable 6e band in wireless-
> next.
>
> My test system has Intel radios and mt7922 radios in it. I bisected
> to the commit
> below. It looks like that patch can disable 6e based on regdom
> change, but cannot
> enable 6e again in case regdom changes back to something that
> supports 6e.
>
> Intel tri-band radios disable 6e by default, then enable it after
> scanning
> US regdom beacons. Maybe that regdom changing by Intel helps break
> the mt7922
> with the below patch applied?
Thanks for the report. There is a capability check missed. Could you
pleae help to check this patch? Let's make sure you run into the same
problem.
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/init.c
b/drivers/net/wireless/mediatek/mt76/mt7921/init.c
index 55baac70860b..a738ea95110e 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/init.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/init.c
@@ -69,6 +69,9 @@ mt7921_regd_channel_update(struct wiphy *wiphy,
struct mt792x_dev *dev)
struct ieee80211_channel *ch;
int i, cfreq;
+ if (!(dev->phy.chip_cap & MT792x_CHIP_CAP_CLC_EVT_EN))
+ dev->phy.clc_chan_conf = 0xff;
+
np = mt76_find_power_limits_node(mdev);
sband = wiphy->bands[NL80211_BAND_5GHZ];
Thanks,
Deren
>
> commit 09382d8f8641bc12fffc41a93eb9b37be0e653c0
> Author: Ming Yen Hsieh <mingyen.hsieh@xxxxxxxxxxxx>
> Date: Sat Sep 30 10:25:09 2023 +0800
>
> wifi: mt76: mt7921: update the channel usage when the regd
> domain changed
>
> The 5.9/6GHz channel license of a certain platform device has
> been
> regulated in various countries. That may be difference with
> standard
> Liunx regulatory domain settings. In this case, when
> .reg_notifier()
> called for regulatory change, mt792x chipset should update the
> channel
> usage based on clc or dts configurations.
>
> Channel would be disabled by following cases.
> * clc report the particular UNII-x is disabled.
> * dts enabled and the channel is not configured.
>
> Signed-off-by: Ming Yen Hsieh <mingyen.hsieh@xxxxxxxxxxxx>
> Co-developed-by: Deren Wu <deren.wu@xxxxxxxxxxxx>
> Signed-off-by: Deren Wu <deren.wu@xxxxxxxxxxxx>
> Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
>
> Thanks,
> Ben
>
